Stackable chair with rounded back



FIG. 1 is a perspective view of the design, this view showing the right and front sides thereof;

FIG. 2 is a front view of the design;

FIG. 3 is a back view of the design;

FIG. 4 is a right side view of the design, the left side view being a mirror image of this view; and,

FIG. 5 is a top view of the design. 

The ornamental design for a stackable chair with rounded back, as shown and described. 